What would cause this to happen and how can I fix it? My monitor, after any amount of time, will just randomly stop getting a signal from my tower. It could be 20 minutes, the longest it has taken was an hour and a half.

Sometimes too, my computer will randomly reboot.

My monitor, after any amount of time, will just randomly stop getting a signal from my tower.

How do you get it back?

Some information about the computer would help.